横竖屏切换时Activity的生命周期

横竖屏切换时Activity的生命周期

不设置android:configChanges

切换为横屏:

8d646bb3-be3b-4216-9c2d-fbc1a5ad2fe8.png

onPause:
onSaveInstanceState:
onStop:
onDestroy:
onCreate:
onStart:
onRestoreInstanceState:
onResume:

---

切换为竖屏(生命周期同上)

68591f47-6457-4960-bbfb-ebb4b270b911.png

onPause:
onSaveInstanceState:
onStop:
onDestroy:
onCreate:
onStart:
onRestoreInstanceState:
onResume:

---

清单文件中单独设置:
android:configChanges="orientation"

效果还跟上面一样

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清单文件中设置:
android:configChanges="orientation|keyboardHidden"

android:configChanges="keyboardHidden|screenSize"

效果还跟上面一样

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清单文件中设置:

android:configChanges="orientation|screenSize"

android:configChanges="orientation|keyboardHidden|screenSize"

不调整生命周期

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以上数据在模拟器4.1,5.0,6.0,7.0测出.

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总结:

当横竖屏切换时,会正常的重走一次生命周期的回调方法:

• onPause:
• onSaveInstanceState:
• onStop:
• onDestroy:

• onCreate:
• onStart:
• onRestoreInstanceState:
• onResume:

如果不想在横竖屏切换的时候调整生命周期,清单文件中配置:
android:configChanges="orientation|screenSize"
就够了!

33a3731c-6737-408a-a84c-d88943377467.jpg

在没有配置android:configChanges时,可以在onSaveInstanceState中保存数据,在onRestoreInstanceState中恢复数据.

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